Improvement in lock-nuts



clinitied tste HENRY RosAMYER, 0E ROCHESTER, PENNSYLVANIA.

Leners man: No. 93,230, dated August 3, 1869.

IMPROVEMENT IN Loox-NUTS.

The Schedule referred to in these Letters Patent and making part of thesame,

To all whom 'it 'may concern.

Be it known that I, HENRY RosAmYER, of Rochester, in the county ofBeaver, and State ot' Pennsylvania, have invented a new and usefulImprovement in Lock-Nut'for Bolt-s; and I do hereby declare that thefollowing is a full, clear, and exact description thereof, referencebeing had to the accompanying drawings, and to the letters of referencemarked thereon.

The nature of my invention consists `in providing a screw-nut for bolts,with a spring or springs, which is or are so arranged, with relation tothe opening in thev nut, that said spring or springs will catch in arecess or recesses made in the bolt, and .thereby prevent the nut fromturning backoff the bolt.

lo enable others skilled in thc art to make and use my invention, Iwillproceed to describe its construction and operation.

In the accompanying drawings, which forni part of my specification--Figure l is a side elevation 0i' a bolt, provided with my improvement inlock-nuts.

Figure 2 is a top or end view of the same.

Figure 3 is a side elevation of a key used for unshipping the .springsti'om out of the 'recesses in the holt.

Figure 4 represents the key placed over the end of `the bolt, forunshipping the springs.

ln the drawings- Y A represents the lock-nut, provided with springs B,one cud of which is secured to the nut as indicated at n: in fig. 2.

C represents an ordinary bolt, in the sides of which are recesses orgrooves i, which run lengthways of the1 bolt.

D represents the key used ihr unshippin g the springs B. The shank ofthe key 1) is provided with recesses` lthe screw-threads..

e, for the purpose of allowing the key to pass down over springs B. Y

'lhe relation of the recesses e, in the shank of the key, to thesprings, is clearly shown at 0, in fig. 2, the parts O being sections ofthe shank of the key, when ent through at line S, shown in g. 3.

The recesses in the sides ofthe bolt C shouldextend along the sides ofthe-bolt, nearly the whole lengt-h of The nut Amay be recessed ont., asshown in the accompanying drawings, seas' to form a guard for thesprings, or the springs may be placed on the cutersnrface of the end ofthe nut. e The operation of removing the nut is as follows: The key D isplaced over the end of the/boltas shown in iig. 4.l it is thenturncdone-fourth way round, which willbiing the parts O of' the shank of thekey in contact with the springs B,'a nd force them lout of the recessesti. of the bolt. The'nntis then removed from the bolt by any knownmeans.

` 1 do not claim, as part of my invention, providing the screw-threadsoi' bolts with ratchet-teeth; neither do I claim providing a screw-nutfor bolts, with a ratchet-pawlor a spring-ratchet, for these devicesare,

well-known. y

Having thns described the nature, construction, and

operation of my improvement,

That 'I claim is of my invention, is-

A screw-nut for bolts, when said nut is recessed as herein described,and provided with springs, for catching in recesses in the bolt, andthereby preventing any back movement of the nut.

HENRY ROSAMYER. Witnesses:

DAVID STEWART, J Mns J'. JOHNSTON.

